CN108191184B - Chemical deodorization method for sludge - Google Patents
Chemical deodorization method for sludge Download PDFInfo
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- CN108191184B CN108191184B CN201810083524.XA CN201810083524A CN108191184B CN 108191184 B CN108191184 B CN 108191184B CN 201810083524 A CN201810083524 A CN 201810083524A CN 108191184 B CN108191184 B CN 108191184B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/06—Treatment of sludge; Devices therefor by oxidation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/02—Odour removal or prevention of malodour
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a chemical deodorization method for sludge, which comprises the steps of firstly placing the sludge to be treated in a regulating reservoir, then adjusting the water content of the sludge to be treated, pumping the sludge in the regulating reservoir into a reaction reservoir, adding a ferrate solution into the reaction reservoir, stirring the sludge in the reaction reservoir, adding quicklime and a surfactant into the reaction reservoir, continuously stirring the sludge in the reaction reservoir, pumping the sludge in the reaction reservoir into a dewatering reservoir, adding diatomite and zeolite into the dewatering reservoir, stirring the sludge in the dewatering reservoir, precipitating the sludge in the dewatering reservoir, discharging supernatant after precipitation into a reservoir, dewatering through a sludge dewatering device, conveying discharged water into the reservoir, conveying the discharged sludge into a soil reservoir, and taking out and conveying the sludge conveyed into the soil reservoir after the sludge reaches a specified standing time; the invention effectively improves the deodorization effect on the sludge, effectively utilizes the sludge, reduces the pollution of the sludge to the environment and improves the application value of the sludge.
Description
Technical Field
The invention relates to a sludge treatment method, in particular to a chemical deodorization method for sludge, belonging to the technical field of sludge treatment.
Background
The sludge is a solid precipitate produced in the process of water and sewage treatment, is a product after sewage treatment, is an extremely complex heterogeneous body consisting of organic fragments, bacterial thalli, inorganic particles, colloids and the like, has the main characteristics of high water content which can reach more than 99 percent, high organic matter content, easy decomposition and stink generation, fine particles, small specific gravity, colloidal liquid state, is a thick substance between liquid and solid, can be transported by a pump, but is difficult to carry out solid-liquid separation by sedimentation; most of the sludge can generate odor to seriously pollute the environment, thereby greatly reducing the application value of the sludge.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides a chemical sludge deodorization method, which effectively improves the deodorization effect on sludge, effectively utilizes the sludge, reduces the pollution of the sludge to the environment and improves the application value of the sludge.
The technical scheme adopted by the invention is as follows:
a chemical deodorization method for sludge comprises the following steps:
firstly, sludge to be treated is placed in a regulating tank, then water is injected into the regulating tank, the water content of the sludge to be treated in the regulating tank is adjusted, the sludge in the regulating tank is pumped into a reaction tank through a first sludge delivery pump, ferrate solution or ferrous sulfate and hydrogen peroxide are added into the reaction tank, the sludge in the reaction tank is stirred, the sludge in the reaction tank is mixed and reacted with the added ferrate solution or ferrous sulfate and hydrogen peroxide, quicklime and surfactant are added into the reaction tank, the sludge in the reaction tank is continuously stirred, the sludge in the reaction tank is mixed and reacted with the added quicklime and surfactant, finally the sludge in the reaction tank is pumped into a dewatering tank through a second sludge delivery pump, diatomite and zeolite are added into the dewatering tank, the sludge in the dewatering tank is stirred, and the added diatomite and zeolite are uniformly mixed in the sludge, stopping stirring after the uniform mixing, making mud deposit in the dehydration pond, the supernatant after the sediment is arranged to the cistern, and the mud after the sediment carries out dehydration through sludge dewatering equipment, and the cistern is carried to sludge dewatering equipment exhaust water, and the mud pond is carried to sludge dewatering equipment exhaust mud, carries the mud in the mud pond and then takes out in the mud pond and transports after reaching the specified time of stewing.
As a further preferred aspect of the present invention, the ferrate solution is prepared by oxidizing Fe with NaClO3+FeO produced from the salt4 2-And ClO-A coexisting alkaline solution; or by recrystallization to give K2FeO4And dissolving in alkali solution.
As a further optimization of the invention, the water content of the sludge to be treated in the adjusting and regulating tank is adjusted to 83-84%, which is beneficial to the mixing reaction of the sludge and the chemical substances added later.
As a further optimization of the invention, the ratio of the ferrous sulfate to the hydrogen peroxide added into the reaction tank is 3:7 in parts by weight, and the treatment effect on the sludge is improved by reasonable proportioning.
As further optimization of the invention, the ratio of the mass parts of the quicklime and the surfactant added into the reaction tank is 8:2, the mixture ratio is reasonable, and the sludge treatment effect is improved.
As a further optimization of the invention, the diatomite and the zeolite are added into the dewatering pool in a mass part ratio of 6:4, and the mixture ratio is reasonable, so that the sludge treatment effect is improved.
As a further preferred mode of the invention, the zeolite added into the dewatering tank is zeolite powder with the particle size not more than 1mm, so that the zeolite and the sludge can be uniformly mixed.
As a further preferable mode of the present invention, the stirring time after adding the ferrate solution or the ferrous sulfate and the hydrogen peroxide to the reaction tank is 30 minutes, which is advantageous for the ferrate solution or the ferrous sulfate and the hydrogen peroxide to react with the sludge.
As a further preferred aspect of the present invention, the stirring time after adding the quicklime and the surfactant to the reaction tank is 40 minutes, which is favorable for the quicklime and the surfactant to react with the sludge.
As a further preferred of the present invention, the standing time of the mud in the mud pool is 24 hours, and a heating device is provided at the bottom of the mud pool to facilitate the rapid drying of the dewatered mud.
The invention has the beneficial effects that: the added ferrate has oxidizing property and reducing property to H as odor source2The elimination rate of S can reach more than 99 percent; the ferrous sulfate catalytically decomposes the hydrogen peroxide, so that the hydrogen peroxide has strong oxidizing capability, pollutants such as aromatic hydrocarbon, trioctyl phosphate, 2-ethyl anthraquinone and the like in the sludge are oxidized and removed, the quicklime is used for adjusting the pH value of the sludge, the surfactant plays a solubilizing role in the subsequent dehydration process of the sludge, the deodorization effect of the diatomite is mainly derived from the micropore structure and the chemical characteristics of the diatomite, and micropores on a diatomite shell are dense, the stacking density is small, the specific surface area is large, so that the diatomite has strong adsorption force and filtering performance, the content of the diatomite is high, and the pores are many, it has strong odor adsorption capacity and good deodorization effect, meanwhile, the diatomite is easy to react with the ammonia hydrate in the sludge, thereby reducing the release amount of ammonia gas in the sludge, and the adsorption capacity of the zeolite to ammonia nitrogen in the sludge is stronger, so that the added mineral admixture has very good deodorization effect on the sludge; the invention effectively improves the deodorization effect on the sludge, effectively utilizes the sludge, reduces the pollution of the sludge to the environment and improves the application value of the sludge.
The specific implementation mode is as follows:
the present invention will be described in detail with reference to the following examples.
Example one
A chemical deodorization method for sludge comprises the following steps:
firstly, placing sludge to be treated in a regulating reservoir, then injecting water into the regulating reservoir, adjusting the water content of the sludge to be treated in the regulating reservoir, pumping the sludge in the regulating reservoir into a reaction reservoir through a first sludge delivery pump, adding a ferrate solution into the reaction reservoir, stirring the sludge in the reaction reservoir, enabling the sludge in the reaction reservoir to be mixed and reacted with the added ferrate solution, then adding quick lime and a surfactant into the reaction reservoir, continuously stirring the sludge in the reaction reservoir, enabling the sludge in the reaction reservoir to be mixed and reacted with the added quick lime and the surfactant, finally pumping the sludge in the reaction reservoir into a dewatering reservoir through a second sludge delivery pump, adding kieselguhr and zeolite into the dewatering reservoir, stirring the sludge in the dewatering reservoir, enabling the added kieselguhr and zeolite to be uniformly mixed in the sludge, stopping stirring after uniform mixing, enabling the sludge to be precipitated in the dewatering reservoir, and discharging the supernatant after precipitation into a reservoir, dehydrating the precipitated sludge through sludge dewatering equipment, conveying water discharged by the sludge dewatering equipment to the reservoir, conveying the sludge discharged by the sludge dewatering equipment to a soil pond, and taking out and conveying the sludge conveyed to the soil pond after the specified standing time is reached.
The ferrate solution in this example was prepared by oxidizing Fe with NaClO3+FeO produced from the salt4 2-And ClO-A coexisting alkaline solution; in practical application, K can also be prepared by recrystallization2FeO4And dissolving in alkali solution.
The water content of the sludge to be treated in the adjusting tank is adjusted to 83% in the embodiment, which is beneficial to the mixing reaction of the sludge and the chemical substances added subsequently.
In the embodiment, the mass part ratio of the quicklime to the surfactant added into the reaction tank is 8:2, the mixture ratio is reasonable, and the sludge treatment effect is improved.
In the embodiment, the diatomite and the zeolite are added into the dewatering pool in a mass part ratio of 6:4, and the treatment effect on the sludge is improved by reasonable proportioning.
In the embodiment, the zeolite added into the dewatering tank is zeolite powder with the particle size not more than 1mm, so that the zeolite and the sludge can be uniformly mixed.
In this embodiment, the stirring time after adding the ferrate solution into the reaction tank is 30 minutes, which is favorable for the ferrate solution to react with the sludge.
In the embodiment, the stirring time after adding the quicklime and the surfactant into the reaction tank is 40 minutes, which is beneficial to the reaction between the quicklime and the surfactant and the sludge.
In this embodiment, the time of stewing of mud in the earth pond is 24 hours, and is provided with heating device in the bottom in earth pond, is favorable to the mud fast drying after the dehydration.
Example two
A chemical deodorization method for sludge comprises the following steps:
firstly, placing sludge to be treated in a regulating reservoir, then injecting water into the regulating reservoir, adjusting the water content of the sludge to be treated in the regulating reservoir, pumping the sludge in the regulating reservoir into a reaction reservoir through a first sludge delivery pump, adding ferrous sulfate and hydrogen peroxide into the reaction reservoir, stirring the sludge in the reaction reservoir, enabling the sludge in the reaction reservoir to be mixed and reacted with the added ferrous sulfate and the added hydrogen peroxide, then adding quicklime and a surfactant into the reaction reservoir, continuously stirring the sludge in the reaction reservoir, enabling the sludge in the reaction reservoir to be mixed and reacted with the added quicklime and the surfactant, finally pumping the sludge in the reaction reservoir into a dewatering reservoir through a second sludge delivery pump, adding kieselguhr and zeolite into the dewatering reservoir, stirring the sludge in the dewatering reservoir, enabling the added kieselguhr and zeolite to be uniformly mixed in the sludge, stopping stirring after uniform mixing, enabling the sludge to be precipitated in the dewatering reservoir, and discharging the supernatant after precipitation into a reservoir, dehydrating the precipitated sludge through sludge dewatering equipment, conveying water discharged by the sludge dewatering equipment to the reservoir, conveying the sludge discharged by the sludge dewatering equipment to a soil pond, and taking out and conveying the sludge conveyed to the soil pond after the specified standing time is reached.
The water content of the sludge to be treated in the adjusting tank is adjusted to 84%, which is beneficial for the mixing reaction of the sludge and the chemical substances added subsequently, and the water content of the sludge to be treated in the adjusting tank can also be adjusted to 83.5% in practical application.
In the embodiment, the ferrous sulfate and the hydrogen peroxide are added into the reaction tank in a mass part ratio of 3:7, and the treatment effect on the sludge is improved by reasonable proportioning.
In the embodiment, the mass part ratio of the quicklime to the surfactant added into the reaction tank is 8:2, the mixture ratio is reasonable, and the sludge treatment effect is improved.
In the embodiment, the diatomite and the zeolite are added into the dewatering pool in a mass part ratio of 6:4, and the treatment effect on the sludge is improved by reasonable proportioning.
In the embodiment, the zeolite added into the dewatering tank is zeolite powder with the particle size not more than 1mm, so that the zeolite and the sludge can be uniformly mixed.
In this embodiment, the stirring time after the ferrous sulfate and the hydrogen peroxide are added to the reaction tank is 30 minutes, which is beneficial to the reaction between the ferrous sulfate and the hydrogen peroxide and the sludge.
In the embodiment, the stirring time after adding the quicklime and the surfactant into the reaction tank is 40 minutes, which is beneficial to the reaction between the quicklime and the surfactant and the sludge.
In this embodiment, the time of stewing of mud in the earth pond is 24 hours, and is provided with heating device in the bottom in earth pond, is favorable to the mud fast drying after the dehydration.
The ferrate added in the invention has oxidability and can react with H which has reducibility and is used as an odor source2The elimination rate of S can reach more than 99 percent; the ferrous sulfate catalyzes and decomposes the hydrogen peroxide to ensure that the hydrogen peroxide has extremely strong oxidizing capability, so that pollutants such as aromatic hydrocarbon, trioctyl phosphate, 2-ethyl anthraquinone and the like in the sludge are oxidized and removed, the quicklime is used for adjusting the pH value of the sludge, the surfactant plays a role of solubilization in the subsequent dehydration process of the sludge, the deodorization effect of the diatomite is mainly derived from the micropore structure and the chemical characteristics of the diatomite, and micropores on the diatomite shell are dense, the stacking density is small, the specific surface area is large, so that the diatomite shell has the advantages of high oxidation resistance, high deodorization effectThe diatomite has high content of diatomite, more pores, strong odor adsorption capacity and good deodorization effect, and simultaneously, the diatomite is easy to react with ammonia hydrate in the sludge, so that the release amount of ammonia in the sludge is reduced, and the adsorption capacity of zeolite on ammonia nitrogen in the sludge is also strong, so that the added mineral admixture has very good deodorization effect on the sludge; the invention effectively improves the deodorization effect on the sludge, effectively utilizes the sludge, reduces the pollution of the sludge to the environment and improves the application value of the sludge.
The above description is only a preferred embodiment of the present patent, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the inventive concept, and these modifications and decorations should also be regarded as the protection scope of the present patent.
Claims (2)
1. A chemical deodorization method for sludge is characterized by comprising the following steps:
firstly, sludge to be treated is placed in a regulating tank, then water is injected into the regulating tank, the water content of the sludge to be treated in the regulating tank is adjusted, the sludge in the regulating tank is pumped into a reaction tank through a first sludge delivery pump, ferrate solution or ferrous sulfate and hydrogen peroxide are added into the reaction tank, the sludge in the reaction tank is stirred, the sludge in the reaction tank is mixed and reacted with the added ferrate solution or ferrous sulfate and hydrogen peroxide, quicklime and surfactant are added into the reaction tank, the sludge in the reaction tank is continuously stirred, the sludge in the reaction tank is mixed and reacted with the added quicklime and surfactant, finally the sludge in the reaction tank is pumped into a dewatering tank through a second sludge delivery pump, diatomite and zeolite are added into the dewatering tank, the sludge in the dewatering tank is stirred, and the added diatomite and zeolite are uniformly mixed in the sludge, after uniform mixing, stopping stirring, precipitating the sludge in a dehydration pool, discharging supernatant after precipitation into a reservoir, dehydrating the precipitated sludge through sludge dehydration equipment, conveying water discharged by the sludge dehydration equipment to the reservoir, conveying sludge discharged by the sludge dehydration equipment to a soil pool, and taking out and conveying the sludge conveyed to the soil pool after the specified standing time is reached;
the water content of the sludge to be treated in the adjusting and regulating tank is 83-84%; the mass part ratio of ferrous sulfate to hydrogen peroxide added into the reaction tank is 3: 7; adding quicklime and a surfactant into the reaction tank at a mass part ratio of 8: 2; the mass part ratio of the diatomite to the zeolite added into the dehydration pool is 6:4, and the zeolite added into the dehydration pool is zeolite powder with the particle size not more than 1 mm;
the stirring time after adding the ferrate solution or the ferrous sulfate and the hydrogen peroxide into the reaction tank is 30 minutes;
the stirring time after adding the quicklime and the surfactant into the reaction tank is 40 minutes;
the standing time of the mud in the mud pool is 24 hours, and a heating device is arranged at the bottom of the mud pool.
2. The method of claim 1, wherein said ferrate solution is prepared by oxidizing Fe with NaClO3+FeO produced from the salt4 2-And ClO-A coexisting alkaline solution; or by recrystallization to give K2FeO4And dissolving in alkali solution.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810083524.XA CN108191184B (en) | 2018-01-29 | 2018-01-29 | Chemical deodorization method for sludge |
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| CN201810083524.XA CN108191184B (en) | 2018-01-29 | 2018-01-29 | Chemical deodorization method for sludge |
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| CN108191184A CN108191184A (en) | 2018-06-22 |
| CN108191184B true CN108191184B (en) | 2021-04-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109234025A (en) * | 2018-10-09 | 2019-01-18 | 岳阳宇翔科技有限公司 | Sour water tank deodorization cleaning formulation and its cleaning method |
| CN109574459B (en) * | 2018-12-14 | 2020-09-15 | 上海交通大学 | Method for improving sludge dewatering performance by utilizing combined conditioning of segmented microbubble ozone and surfactant |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS571481A (en) * | 1980-06-06 | 1982-01-06 | Ebara Infilco Co Ltd | Disposal of cyanide-contng. solid waste |
| CN102408178A (en) * | 2010-09-21 | 2012-04-11 | 上海市政工程设计研究总院 | Deep dewatering method for sludge |
| CN106430890A (en) * | 2016-10-26 | 2017-02-22 | 中国建筑材料科学研究总院 | Sludge dewatering method for reduction |
| CN107032568A (en) * | 2016-12-14 | 2017-08-11 | 广东科达洁能股份有限公司 | A kind of municipal sludge deodorization decrement treatment system |
| CN107129129A (en) * | 2017-05-24 | 2017-09-05 | 田仕明 | A kind of efficient conditioner of deeply dehydrating sludge of zeolite improvement and preparation method thereof |
-
2018
- 2018-01-29 CN CN201810083524.XA patent/CN108191184B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS571481A (en) * | 1980-06-06 | 1982-01-06 | Ebara Infilco Co Ltd | Disposal of cyanide-contng. solid waste |
| CN102408178A (en) * | 2010-09-21 | 2012-04-11 | 上海市政工程设计研究总院 | Deep dewatering method for sludge |
| CN106430890A (en) * | 2016-10-26 | 2017-02-22 | 中国建筑材料科学研究总院 | Sludge dewatering method for reduction |
| CN107032568A (en) * | 2016-12-14 | 2017-08-11 | 广东科达洁能股份有限公司 | A kind of municipal sludge deodorization decrement treatment system |
| CN107129129A (en) * | 2017-05-24 | 2017-09-05 | 田仕明 | A kind of efficient conditioner of deeply dehydrating sludge of zeolite improvement and preparation method thereof |
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